Hydrometer and Lactometer

Q.

A hydrometer is based on

1. Principle of floatation

2. Pascal's law

3. Principle of Relative density.

4. Bernoulli's principle

Q. Hydrometer can be calibrated for different purposes. Is the statement true or False.

Q. A hydrometer is used to measure , which of the following quantity of a liquid ?

1. Volume
2. Temperature
3. Mass
4. Relative density

Q. A hydrometer is primarily used to measure ______ of a liquid.

1. density
2. mass
3. volume
4. inertia

Q. What does hydrometer consists of?

1. cylindrical stem and bulb weighted with mercury
2. cylindrical stem and bulb weighted with water
3. Only cylindrical stem
4. only bulb weighted with mercury

Q. In figure (b), pressure of air above the hydrometer is:

1. less than atmospheric
2. atmospheric
3. more than atmospheric
4. Can't be said

Q. The principle of working of hydrometer is based on Archimedes's principle

1. True
2. False

Q. Lactometer is graduated into how many parts

1. Hundred
2. thousand
3. ten
4. one

Q. Which is the best instrument for testing the state of charge of car battery ?

1. Ammeter
2. Voltameter
3. Voltmeter
4. Hydrometer

Q. Hydrometer is used to measure

1. Pressure
2. Weight
3. Density
4. Mass